Tool-holder.



G. F. KRIEGER.

TOOL HOLDER.

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ATTORNEYS www@ G." P. KRIEGER.

TooL HOLDER.

APPLICATION FILED 00T. 19. 1907.

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A TTOHNEYS GEORGE F. KRIFGER, OF GRAND RAPIDS, WISGONSIN.

TOOL-HOLDER.

Application lled October 19, 1907.

Specification of Letters Patent.

Patented Feb. 9, 1909.

Serial No. 398,169.

To all Iw/zom it 'ma/ U concern.'

Be it known that I, GEORG-E F. linmean, a citizen of the United States, and a resident ol Grand Rapids, in the county oi Food and State oi Wisconsin, have invented a new and Improved Tool-Holder, of which the followg nig is a lull, clear, and exact description.

This invention relates to tool holders such operations such as boring, turning or planmg.

The object of the invention is to provide a tool holder with an adjustable member which will enable the tool to be clamped adj ustably upon the tool holder in any desired position, the construction being such that the tightening ol the clamping means for holding the tool upon the adjustable member also operates to secure the adjustable member upon the body of the tool holder.

The invention consists in the construction and combination of parts to be more 'fully described hereinafter and particularly set -lforth in the claims.

Reference is to be had to the accompanying drawings forming a part of this speciiication, in which similar characters of reference indicate corresponding parts in all the llgures.

Figure 1 is a perspective Showing a tool holder constructed according to my invention. Fig. 2 is a vertical section through the tool holder at the tool, and passing in a plane at right angles to the axis of the tool this view shows the tool holder as used to secure a tool of small size 5 Fig. 2aL is an elevation oi the tool holder in a plane parallel with the plane oll the section Fig. 2, but showing the tool holder as used in holding a tool of large size 5 Fig. 2b is a view of a lorm showing a simpler construction than that shown in Fig. 2, Fig. 3 is a plan of the tool holder, Fig. 4 is a bottom plan oi the cap which constitutes a part of the tool holder.

Referring more particularly to the parts, and especially to Figs. 1 to 4, 1 represents the body or arm of a tool holder. The eX- tremity of this arm is bent slightly to one side, as illustrated most clearly in Fig. 3, and

is formed with a rounded wrist 2 or stub end.

Upon this wrist I apply a sleeveB which is provided with a longitudinal slit or cut 4 which extends throughout the entire length thereof, as shown. On the upper side of the sleeve near this slit 4 a longitudinally eX- tending groove 5 is formed, the said groove constituting a tool seat. The material is l i l 1 1 reinforced at this point as shown, and the groove is oi" V form having a flat bottom, as indicated most clearly in Figs. 1, 2 and 2a. On each side and preferably near its middle point, the sleeve 3 is provided with lugs 6 and 7. The lug 7 is disposed just below the slit 4, so that the slit lies between this lug and the tool seat or groove 5. as used for holdin@ cutting tools in machine f Above the tool seat, I provide a reversible cap S which is provided on one side with a shallow or large groove 9 very similar in form to the groove or tool seat 5. On its other side, that is, on its under side as shown in Fig. 1, the cap is provided with a longitudinal groove 10, which is of small dimensions. This cap is provided with oppositely disposed openings which aline with the lugs 6 and 7, and through these openings clamping bolts 11 extend downwardly, the lower portions of said bolts being threaded in the lugs, as indicated in Fig. 2. When the cap is applied as shown in Fig. 2, that is, with the small groove 1 0 downwardly, the tool holder is adapted to hold a tool or tool bar 12 indicated by the dotted lines, and this tool bar may be of small dimensions or diameter, as indicated. In the reverse position, as indicated in Fig. 2 a, the cap affords means for holding a tool or tool bar 13, ol' larger dimension or diameter. It will be evident that when the bolts 11 are screwed up in order to clamp the tool upon the tool seat, the sleeve will be at the same time clamped upon the wrist 2. In this way one operation sulices to secure the tool upon the sleeve and the sleeve upon the wrist. In order to increase the holding power of the cap and seat, the middle portion of the seat is provided with a recess 14, as illustrated in Fig. 3. In this way the seat presents clamping jaws or faces 15 disposed at the ends of the sleeve. Likewise, the grooves ofthe cap are provided with central recesses 16, as illustrated in Fig. 4.

In the form shown in Fig. 2b I provide a main sleeve 37 mounted on the wrist 36 and formed with a longitudinal slit or split 38 inclined as shown. A smaller sleeve 39 is formed integral with the main sleeve and receives the tool 40 as indicated. This sleeve is formed with a slit or split 41, inclined oppositely to the slit 38 but on the same side. rIhese slits 3S and 41 extend through clamping lugs 42 formed at the side of the holder and provided with clamping bolts 43 for bringing the parts together. With this construction it ismevidentthatgwhen the boltsare tightened up they Will clamp the Wrist and the tool simultaneously.

Having thus described my invention, I claim as new and desire to seoure by Letters Patent:

l. A tool holder having` an arm with a Wrist formed thereupon, a sleeve mounted on said Wrist and having clamping devices disposed on opposite sides of said Wrist, said sleeve having a slit in the Wall thereof disposed between said clamping devices and presenting a seat for the tool near said slit, and a removable Gap secured by said clamping devices and adapted to torce the tool downwardly upon said seat, the pressure on said tool seat atlording means for clamping said sleeve upon said Wrist.

2. A tool holderv havingl an arm with a Wrist formed thereupon, a sleeve rotatably mounted on Said Wrist7 having clamping lugs on the sides thereof, and a tool seat between said lugs, said sleeve having a slit extending longitudinally thereof between said seat and one of said lugs7 a cap cooperating With said seat to hold a tool thereupon, and clamping polts securingl said Gap and mounted in said ugs.

ln testimony whereof l have signed my name to this speciiication in the presence of two sulsoribing Witnesses.

GECRGE F. KRIEGER. l/itnesses 1 WILLIAM A. DRUMB, A. B. SU'ron. 

